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Old 08-21-2011, 04:27 PM
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66 mustang starting problem

One day will turn over with the key, next day key is dead and all accessaries non functioning Had the battery full charged, and even had jump from running 73 mustang grande. even with a jump, turned over slow. checked for fire at coil wire. very small yellow orange spark 1/4 of an inch. clean tight cables, checked out coil/seemed within limits/condensor went up and then back down on it's test. clean gapped plugs, all tight. Next try about four days later would not turn with key no voltage at coil. hooked up jumper wire at coil bypassed switch turned over at solonoid, seemed to fire maybe once, smelled gas and starting fluid, so I know it fired, be cause we had primed it the first time. Would it be just that the bat is gunny bag it had 12.43 volts, but I didn't load test or use hydrometer. Nice cherry car, needs to feel the road again. Has been parked 1 year!Because it wouldn't start all of the time, so wasn't dependable Help her roar again!

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Old 08-21-2011, 04:42 PM
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Sounds like you have a constant drain on your batt. Radio components are a very likely culprit, (just replaced the amps on a friends mustang for the constantly dead batt problem), $150.00 for NOS amps and ....problem gone, the amps were draining the batt overnight.
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Old 08-21-2011, 04:48 PM
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My 66 did the same thing turned out the wiring harness from the alt was bad replaced that and it was fine. does it still have the original wiring ?


Cole
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Old 08-21-2011, 05:06 PM
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Hey cole! It seems also that The voltage regulator might have been replaced! And yes it looks like wire wireing from the alt. was at least looked at, because its not the original wrap, its tape. It's not My car, but a good friend, so i'm trying to get her going. I think the wiring is ariginal though. I'll check that out throughly;
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Old 08-22-2011, 12:39 PM
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I seem to recall there was a harness that ran by the radiator that goes bad on those and causes the type of issues you are describing.
Might be worth taking a look at.
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